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An automobile engine slows down from 4500 rpm to 1200 rpm in 2.5 s. Calculate:
a) Its angular acceleration, assumed constant.b) the total number of revolutions the engine makes in this time
A physics book slides off a horizontal tabletop with a speed of 2.70{\rm m}/{\rm s} . It strikes the floor in 0.350{\rm s} . Ignore air resistance. Find the height of the tabletop above the floor
The loaded cab of an elevator has a mass of 3000kg and moves 216-m up the shaft in 23s at constant speed. At what average rate does the force from the cable do work on cab.
A 8.00 kg bullet traveling at 475 m/s embeds itself in a 1.69 kg wooden block at rest on a frictionless surface. Find the amplitude of the subsequent simple harmonic motion
q1. using the equation fm v2r for a force an object in circular motion. find the radius r of motion of a m1.6 kg ball
When the temperature of a coin is raised by 71.8 C°, the coin's diameter increases by 2.11 x 10-5 m. find the coefficient of linear expansion
A cart of 0.5 kg hits a fixed cart of 1.5 kg with a velocity of 3 m/s in the north direction. Both carts get stuck together and move, What is the direction of the velocity vector
Suppose two alpha particles were held together so they were just touching. Estimate the electrostatic repulsive force each would exert on the other
A coil with 150 turns, a radius of 5.0cm , and a resistance of 12 Ohms surrounds a solenoid with 200 turns/cm and a radius of 4.3cm, Calculate the magnitude and direction of the induced current in the 150-turn coil
A bucket filled with water has a mass of 64.9 kg and is attached to a rope that is wound around a 0.4 m radius cylinder. Illustrate what torque does the bucket produce around the center of the cylinder?
a bicycle with a 27-in diameter wheels has a chain ring with 52 teeth and a cog with 26 teeth. the cyclist is pedaling
A rocket with a mass of 750 grams is launched straight up. It achieves a velocity of 25.00 m/s in 2.00 seconds, The average net force on the rocket is
A particle with charge 2.8 C moves through a uniform magneticfield. At one instant the velocity of the particle is (1.4 i +1.2 j + 0.48 k) m/s and the magnetic force on the particle is(11.9 i - 14.1 j + 1.57 k) N.
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